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Issue 1310283005: Use ShouldEnsureSpaceForLazyDeopt more. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 3 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "src/code-factory.h" 5 #include "src/code-factory.h"
6 #include "src/code-stubs.h" 6 #include "src/code-stubs.h"
7 #include "src/cpu-profiler.h" 7 #include "src/cpu-profiler.h"
8 #include "src/hydrogen-osr.h" 8 #include "src/hydrogen-osr.h"
9 #include "src/ic/ic.h" 9 #include "src/ic/ic.h"
10 #include "src/ic/stub-cache.h" 10 #include "src/ic/stub-cache.h"
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765 765
766 766
767 void LCodeGen::DeoptimizeIf(Condition condition, LInstruction* instr, 767 void LCodeGen::DeoptimizeIf(Condition condition, LInstruction* instr,
768 Deoptimizer::DeoptReason deopt_reason, 768 Deoptimizer::DeoptReason deopt_reason,
769 Deoptimizer::BailoutType bailout_type, 769 Deoptimizer::BailoutType bailout_type,
770 Register src1, const Operand& src2) { 770 Register src1, const Operand& src2) {
771 LEnvironment* environment = instr->environment(); 771 LEnvironment* environment = instr->environment();
772 RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt); 772 RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
773 DCHECK(environment->HasBeenRegistered()); 773 DCHECK(environment->HasBeenRegistered());
774 int id = environment->deoptimization_index(); 774 int id = environment->deoptimization_index();
775 DCHECK(info()->IsOptimizing() || info()->IsStub());
776 Address entry = 775 Address entry =
777 Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type); 776 Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type);
778 if (entry == NULL) { 777 if (entry == NULL) {
779 Abort(kBailoutWasNotPrepared); 778 Abort(kBailoutWasNotPrepared);
780 return; 779 return;
781 } 780 }
782 781
783 if (FLAG_deopt_every_n_times != 0 && !info()->IsStub()) { 782 if (FLAG_deopt_every_n_times != 0 && !info()->IsStub()) {
784 Register scratch = scratch0(); 783 Register scratch = scratch0();
785 ExternalReference count = ExternalReference::stress_deopt_count(isolate()); 784 ExternalReference count = ExternalReference::stress_deopt_count(isolate());
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5836 Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); 5835 Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
5837 __ ld(temp1, MemOperand(temp1, StandardFrameConstants::kCallerFPOffset)); 5836 __ ld(temp1, MemOperand(temp1, StandardFrameConstants::kCallerFPOffset));
5838 5837
5839 // Check the marker in the calling frame. 5838 // Check the marker in the calling frame.
5840 __ bind(&check_frame_marker); 5839 __ bind(&check_frame_marker);
5841 __ ld(temp1, MemOperand(temp1, StandardFrameConstants::kMarkerOffset)); 5840 __ ld(temp1, MemOperand(temp1, StandardFrameConstants::kMarkerOffset));
5842 } 5841 }
5843 5842
5844 5843
5845 void LCodeGen::EnsureSpaceForLazyDeopt(int space_needed) { 5844 void LCodeGen::EnsureSpaceForLazyDeopt(int space_needed) {
5846 if (!info()->IsStub()) { 5845 if (info()->ShouldEnsureSpaceForLazyDeopt()) {
5847 // Ensure that we have enough space after the previous lazy-bailout 5846 // Ensure that we have enough space after the previous lazy-bailout
5848 // instruction for patching the code here. 5847 // instruction for patching the code here.
5849 int current_pc = masm()->pc_offset(); 5848 int current_pc = masm()->pc_offset();
5850 if (current_pc < last_lazy_deopt_pc_ + space_needed) { 5849 if (current_pc < last_lazy_deopt_pc_ + space_needed) {
5851 int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc; 5850 int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
5852 DCHECK_EQ(0, padding_size % Assembler::kInstrSize); 5851 DCHECK_EQ(0, padding_size % Assembler::kInstrSize);
5853 while (padding_size > 0) { 5852 while (padding_size > 0) {
5854 __ nop(); 5853 __ nop();
5855 padding_size -= Assembler::kInstrSize; 5854 padding_size -= Assembler::kInstrSize;
5856 } 5855 }
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6114 __ Push(at, ToRegister(instr->function())); 6113 __ Push(at, ToRegister(instr->function()));
6115 CallRuntime(Runtime::kPushBlockContext, 2, instr); 6114 CallRuntime(Runtime::kPushBlockContext, 2, instr);
6116 RecordSafepoint(Safepoint::kNoLazyDeopt); 6115 RecordSafepoint(Safepoint::kNoLazyDeopt);
6117 } 6116 }
6118 6117
6119 6118
6120 #undef __ 6119 #undef __
6121 6120
6122 } // namespace internal 6121 } // namespace internal
6123 } // namespace v8 6122 } // namespace v8
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